Rename gaiad toml config

[alexanderbez]

Summary

BaseApp/node configuration that is not specific to Tendermint (eg. min gas prices) currently may be provided via CLI flags or through a configuration file. The latter is hard-coded to gaiad.toml in interceptLoadConfig. This really has nothing to do with Gaia and should be renamed to server.toml or node.toml.

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[alessio]

I agree. We need to work out and upgrade path as well - see tendermint's priv_validator_key split, they made a bunch of functions that migrate config smoothly.

[alessio]

Furthermore (but this may happen at a later stage) we should provide the client app with a mechanism to customise server's commands (e.g. the start command) by passing extra flags. See the unfortunate case of --inv-check-period for instance.

[alexanderbez]

Yes, this can really be done as part of this. I don't see why not. Seems like a simple hook/callback.

[alessio]

I'm fine with that

[fedekunze]

I think this was resolved on the Gaia split. From the 0.36 changelog:

#4104 Rename gaiad.toml to app.toml. The internal contents of the application config remain unchanged.